Espresso machine



FIG. 1 is a front view of an espresso machine showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side perspective thereof; and,

FIG. 8 is a back perspective thereof.

The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an espresso machine, as shown and described. 